I made a mod (for personal use) that is supposed to create a notification when someone says something in a chat.

 

This is my code:

 

ChatNotifier.java:

package com.notifier.chatnotifier;

import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.fml.common.FMLCommonHandler;
import net.minecraftforge.fml.common.Mod;
import net.minecraftforge.fml.common.Mod.EventHandler;
import net.minecraftforge.fml.common.event.FMLPreInitializationEvent;

@Mod(modid = ChatNotifier.MODID, version = ChatNotifier.VERSION)
public class ChatNotifier
{
    public static final String MODID = "Chat Notifier";
    public static final String VERSION = "1.0";
    
    ChatEventHandler handler = new ChatEventHandler();
    
    @EventHandler
    public void preinit(FMLPreInitializationEvent event)
    {
    	FMLCommonHandler.instance().bus().register(handler);
    	MinecraftForge.EVENT_BUS.register(handler);
    }
}

 

ChatEventHandler.java:

package com.notifier.chatnotifier;

import java.io.IOException;

import net.minecraftforge.event.ServerChatEvent;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;

public class ChatEventHandler
{
@SubscribeEvent
public void checkNormalChat(ServerChatEvent event)
{
	try 
	{
		Runtime.getRuntime().exec("notify-send " + event.username + " \"" + event.message + "\""); //Creates a notification (Linux only)
	} 
	catch (IOException e) 
	{
		e.printStackTrace();
	}
}
}

 

The mod works perfectly in singleplayer, but obviously the point of the mod is to create notifications in multiplayer. I've tested it on a completely vanilla server, and also in a craftbukkit server, and neither work.

What event could I use for new messages in the client?

I have a work in progress mod that looks very similar to the one your creating (it has the exact same name) so I'm just wondering were abouts you got the idea for it?  I posted a Alpha version of my mod a few weeks back, information is available on http://www.xelitexirish.com/chat-notifier/

I got the idea for it when I had Minecraft minimized and people wanted me, but I didn't know because I couldn't see it. After that I decided to make a simple mod for myself that sends a notification whenever someone says something in chat. The reason I called it chat notifier was because it did exactly that, notify me of chat. Your mod seems a little different to mine though because mine will send notifications (using system commands) when there is any message at all (which I plan on changing)

That sounds good, I'd like to chat to you about a few things, is this your twitter? https://twitter.com/Orfby/ If so could you follow me back and il send you a message?